package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

/**
 * @param
 * @return
 */
@Service
@Slf4j
public class UserServiceImp implements UserService {
    @Autowired
    private WeChatProperties weChatPropertiesproperties;
    private static String wx_login_url="https://api.weixin.qq.com/sns/jscode2session";
    @Autowired
    private UserMapper userMapper;
    /**
     * 微信登陆
     * @param userLoginDTO
     * @return
     */
    @Override
    public User login(UserLoginDTO userLoginDTO) {
        String openid=getOpenid(userLoginDTO.getCode());
        if(openid==null)
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        User user=userMapper.getByOpenId(openid);
        //判断是否为新用户,是就注册
            if(user==null){
                user=User.builder().openid(openid).createTime(LocalDateTime.now()).build();
                userMapper.Insert(user);
                return user;
            }
        //返回
        return user;
    }

    /**
     * 调用微信接口服务，获取微信服务的openid
     * @param code
     * @return
     */
    private String getOpenid(String code){
        Map<String,String>map=new HashMap<>();
        map.put("appid",weChatPropertiesproperties.getAppid());
        map.put("secret",weChatPropertiesproperties.getSecret());
        map.put("js_code",code);
        map.put("grant_type","authorization_code");
        //调用微信接口服务，获取微信服用户openid
        String json = HttpClientUtil.doGet(wx_login_url, map);
        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");
        return openid;
    }

}
